Turn-button fastener.



D. BOURQUE.

TUR TTON FA 1ER.

APPLICA FILED oc. .19u

1,292,424. Patented Jan. 2a, 1919.

b@ @f5/MW 1%,

UNITED sTATEs PATENT oEEIoEf DAVID BOUQUE, F AMESBURY, MASSACHUSETTS, ASSIGNOR T0 G. W'.v J. MURPHY COMPANY, 0F AMESBURY, MASSACHUSETTS, A CORPORATION 0F MASSACHUSETTS.

TURN-BUTTON FASTENER.

Specicaton of Letters Patent.

Patented Jan. 28h, 1919.

L Application led October 25, 1917. Serial No. 198,531.

i To all whom z't may concern:

Be it known that I, DAVID BOURQUE, a

lcitizen of the United States, and a resident l Fasteners, of which the following description, in connection with the accompanying I drawings,is a specification, like characters on the drawings representing like parts.

This invention relates to fasteners of that type having a movable part, usually rotatable, which in one position may be passed:

through an opening or eyelet and may then be `adjusted to another or traversing position, so that it may not be withdrawn. Such fasteners are commonly used as fasteners for curtains on vehicles. The present invention aims to improve them with a view especially to increased ease of action and greater durability.

As an example of my invention I have herein illustrated a button fastener of the type shown in my Patent No. 1,201,682, and in the accompanying drawings to which 1n connection with the following description I will refer for a better understanding of my invention Figure l is a central longitudinal section on an enlarged scale of a fastener illustrating my invention; and

Fig. 2 is a detail still further enlarged, the view being from the left of Fig. 1.

In the accompanying drawings the fastener includes a base 3 and a head or button 5 rotatably mounted thereon. I use the term button to apply to this part to distinguish it from a head later to be referred to. The word button has no particular connotation or significance. The base 3 is provided with cross grooves 7 and 9 indicated by dotted lines in Fig. 1, in which the button 5 is adapted to sit and it is secured in place by a headed shank 11 passing through the wall of the base and into the button. A spring 13, herein a helical spring, is interposed between the head 15 of shank 11 and theinner wall of base 3 and resiliently holds the button 5 in engagement with one of the grooves. l

As is well understood` when the parts are in the position shown, an eyelet may be passed over the button 5 and the base 3. 'I he button may then be turned to a traversing position, rising somewhat away vfromlthe base, whlch action is permittedby com-pression of the spring 13, and brought to a seat in the transverse groove 91. Inthis position it will llock the eyelet in place on the base 3 in well known manner. f

To insure long life and 'easy working to the fastener I have herein so -arrangedthe parts that there'willbe practically no friction and no wear. In the lpresent instance I have arranged for a practically frictionless bearing between the. spring 13- and the head 15'of the shank. l Referring-'to Fig. 1, when a helical spring as shown'is used, the terminal spire thereofisbent in an opposite sense to the Apitch lof the helix, providing a curved portion 17. The end 19 as seen in Fig. 2 iS directed inwardly toward the preceding spire and is out of contact with the head 15. As seen in Fig. 1, the spring therefore presents smooth bearing to the head 15; andas seen in Fig. 2, since the wire itself is round, the bearing is substantially one-point bearing,` the parts of the spring being curved away from the face of the head 15 at all sides of the point of contact.

When the button is manipulated the head l5 will turn therewith and because of the bearing provided at 17 will move freely over the spring which itself, because of the much greater friction at the other end, will remain stationary. If, on the other hand, the spring is constructed, as has been the custom hitherto, of a segment of a simple helix, not only is there much greater resistance to turning but the sharp corners where the wire was cut are presented both to the head of the shank and to the thin metal of the base 3. Under these circumstances it rapidly wears the parts and in fact it has been customary to provide case hardened pins or shanks 11 to take up this wear, but even this does not do away with the wear on the ductile and therefore soft metal from which the bases are formed. By my present construction not only is the operation of the entire fastener made easy but this wear is entirely done away with, since there is practically no wear on the head 15 of the shank because of the smooth nature of the contacting surface of the spring which forms a substantially frictionless caring and the fact that the freedom of relative movement at this end of the fastener permitg SiIito "rei'n'a'in 'raoteail'y Stationary as regards the base part 3, so that it jhasmn wearing action thereon. y

LnQth'eJpartieular ,embodiment ofJny, invention shown, the spring may be bent as indicated at 17 by the means used to oeil the same fr ,ogrnthe original wire. L A avufg thus described-'an illustrative enibodiment of my invention, Whatalalamas new and desire to secure y Letters Patent. -7?'"1W 11311 JSLili i t. 5:1 .4 vwl; 1w-exi CSimPlSlHg-a h, @Y 10W- *,tahedauttoabamaafhwd.-Shank.extendworaqldrbaead @,'Jfiehcal uns snfarlzlawad ark and,y werp between said base and ead, .ha1y altermin [spire oyide a roun e portion earing mm1 affini ofthe same.

Wig!" tata e nJEST AVAILABLE CLL 3. A fatener 'comprising a hase; a rotatable button having a headed shank extendngnto Said base and aspring, interpoged between .the base. and head, having a portion of its surface bearing on one of the saine and 'having its surface adjacent said portion curved away therefrom at all sides thereof.

as erHo mpr1sin a base, a rou'tlili hagng a haded shank extending into said bae and a p1'igjnterylidingdan tantially one point eontat with 

